Abstract: The present invention provides compounds of formula (I) including stereoisomers, prodrugs and pharmaceutically acceptable salts or solvates thereof (Formula (I)) wherein the dashed line may represent a double bond; R is aryl or heteroaryl, each of which may be substituted by 1 to 4 groups J selected from: halogen, C1-C6 alkyl, C1-C6 alkoxy, halo C1-C6 alkyl, C2-C6 lkenyl, C2-C6 alkynyl, halo C1-C6 alkoxy, —C(O)R2, nitro, hydroxy, —NR3R4, cyano and or a group Z; R1 is hydrogen, C3-C7 cycloalkyl, C1-C6 alkyl, C1-C6 alkoxy, C1-C6 thioalkyl, C2-C6 alkenyl, C2-C6 alkynyl, halo C1-C6 alkyl, halo C1-C6 alkoxy, halogen, NR3R4 or cyano; D, G is —C— optionally substituted; X is carbon or nitrogen; Y is nitrogen or —C— optionally substituted; W is a 4-8 membered ring, which may be saturated or may contain one to three double bonds, and in which:—one carbon atom is replaced by a carbonyl or S(O)m; and—one to four carbon atoms may optionally be replaced by oxygen, nitrogen or NR12, S(O)m, carbonyl, and such ring may be fu